Building, construction, and demolition require a permit. While residents may perform necessary repairs, new additions, garages, decks/porches, fences, sheds, swimming pools, hot tubs, or wood and gas burning stoves require a permit. For more information, contact the Building Department before beginning any construction or demolition project. Please see below for the Building Permit process and corresponding applications.

Residential Building Permits

  1. Submit the short form permit application and pay associated fees.
  2. The Building Department will confirm receipt of the application within 48 hours.
  3. Building Department will review your application in a two week period.
  4. The Permit will be mailed to the property owner’s address.

Commercial, New Build Residential, & Residential Additions Building Permits

  1. Submit the long form residential permit OR the commercial building permit, depending on which permit corresponds with the nature of the property.
  2. The Building Department will confirm receipt of the application within 48 hours and follow-up on the next steps in the process.
  3. If you have to appear before Historic Preservation Committee,  Zoning, or Planning Board, the Building Department should receive your complete permit application 1 month prior to the scheduled meeting.
  4. If you have to appear before the Planning Board for Architectural & Site Plan review, the Building Department should receive your complete permit application 6 weeks prior to the meeting.
  5. Once all approvals have been given, the Permit will be mailed to the property owner’s address.

Per the Village Code, if you complete work without a Permit, your fine may be twice the price of the permit and you may have to appear in court.


Below you’ll find all building permits listed by name.

Architectural/Site Plan Review

Some commercial construction may require Architectural and/or Site Plan Review Application depending upon its scope. If you question if this applies to you, be sure to call the building department.

Demolition Permits

Demolition Permit Requirements and Permit Application

Solar Panel Installation

Unified Solar Permit


You are required to file a permit for plumbing projects in the Village of Williamsville.

Highway Work

If you are doing a plumbing project, you might need a Highway Work Permit Form

Request for a Variance

Download a Zoning Board of Appeals Variance Application if you receive direction from the Building Department that you will need a Zoning Variance.

Sign Permits

Sign Permit Form– the same form is used for Temporary and Permanent requests

Fuel Burning Appliance Permit

Solid/Gas Fuel Burning Appliance Permit

Swimming Pools

Above ground and in-ground pools require a permit from the Building Department. Pools may be located only in a rear yard, must be at least 4 feet from any property line, and at least 10 feet from any building structure, or overhead wiring. Appropriate fencing is necessary.


Installation of any new fence or replacement of an existing fence requires a permit. Fences in a rear yard may be no higher than 6 feet and the good side must face out. In a front yard, fences may be no higher than 3 feet must be located at least 3 feet inside the public sidewalk, and must be of open design which permits 80% visibility through it. Existing fences may remain as they are, provided they are not extended or altered in any way.


As per Chapter 81-6 (C) of the Village Code, all properties must have their sump pump system, footing drains, yard drains, and downspouts inspected and be issued a Certificate of Compliance prior to transfer of ownership. The certificate will be valid for a two-year period from the date of its issuance.  The primary reason for the law is to help mitigate the village’s stormwater runoff and reduce groundwater from entering the sanitary sewer system. A sewer compliance inspection application may be downloaded below.

Sewer Compliance Inspection Application

Fee Schedules:

Seasonal Outdoor Seating

Download a Seasonal Outdoor Seating Permit Application

Tent Permit

Download a Tent Permit